Assembly Instructions

Ripwave Base Station I&C Guide Navini Networks, Inc.
254 Part #40-00047-00 Rev F v1.0 (TTA)
October 23, 2003
Step 4. Calculate the effective noise floor: NF = SNR
TCC
– Level
TCC
.
Where SNR
TCC
is the TCC SNR and Level
TCC
is the received uplink TCC level.
NF should be close to SNR – BTS Sensitivity + 25 ±?5.
Where BTS sensitivity is the BTS sensitivity setting during calibration.
Step 5. Record the CPE output power.
Step 6. Increase the attenuation by 10 dB (increase the attenuation of the adjustable
attenuator).
Step 7. Measure BTS effective noise floor and Modem output power again.
Step 8. Increase the attenuation by the same amount as in individual antenna tests and measure
the BTS effective noise floor and Modem output power.
Step 9. For each attenuation setting, the Modem output power should be 9 dB less compared to
those (average) in individual antenna tests.
Step 10. Increase the attenuation by another 18 dB. The link should be on.
Step 11. Calculate the maximum path allowed as follows:
Max loss = Attenuation total + Cal cable loss + 30
Where Attenuation total is the total attenuation of all attenuators (fixed + adjustable).
Test Procedure - Data Rate
Step 1. Set the attenuation of the attenuator so the total attenuation is about
PTX – 30 +18 – Cal cable loss + 80.
Step 2. Activate all antennas.
Step 3. FTP a file with size greater than 10 Mbps from Modem to BTS (uplink).
Step 4. Check the uplink data rate. It should be approximately 1 Mbps.
Step 5. FTP a file with size greater than 20 Mbps from BTS to Modem (downlink).
Step 6. Check the downlink data rate. It should be approximately 2 Mbps.
After the test is completed, reconnect the calibration cable back to the BTS and run the
calibration. The new calibration table should be the same as before (the changes in Tx and Rx
AGC should be within 2 bits).